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Related Concept Videos

Mitochondria01:37

Mitochondria

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Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...
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Translocation of Proteins into the Mitochondria01:19

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Mitochondrial precursors are translocated to the internal subcompartments via independent mechanisms involving distinct protein machineries called translocases.
Sorting of outer membrane proteins:
Mitochondrial outer membrane proteins are of two types: the transmembrane, beta-barrel porins, and the membrane-anchored, alpha-helical proteins. Beta-barrel porin precursors are translocated by the TOM complex and inserted into the outer mitochondrial membrane by the SAM complex. In contrast,...
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Mitochondrial Membranes01:45

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A single mitochondrion is a bean-shaped organelle enclosed by a double-membrane system. The outer membrane of mitochondria is smooth and contains many porins - the integral membrane transporters. Porins enable free diffusion of ions and small uncharged molecules through the outer mitochondrial membrane but limit the transport of molecules larger than 5000 Daltons. Further, the outer mitochondrial membrane forms a unique structure called membrane contact sites with other subcellular organelles,...
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Energy to Drive Translocation01:37

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Mitochondrial protein import is powered by two distinct energy sources: ATP hydrolysis and electrochemical potential across the inner membrane. Newly synthesized precursors are bound by cytosolic chaperones of the Hsp70 family, which guide them to the import receptors on the mitochondrial surface. Utilizing the energy of ATP hydrolysis, Hsp70 chaperones transfer these precursors to the TOM receptors on the mitochondrial outer membrane.
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Exercise and Muscle Performance01:27

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Exercise induces a range of adaptations in muscle tissue, depending on the type and duration of activity. Such physical training can be broadly categorized into two types: endurance exercises and resistance exercises.
Endurance exercises
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Electron Transport Chain: Complex I and II01:46

Electron Transport Chain: Complex I and II

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The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
ROS generation is regulated and maintained at moderate levels necessary...
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Exercise and Mitochondrial Function: Importance and Inference- A Mini Review.

Vaishali K1, Nitesh Kumar2, Vanishree Rao3

  • 1Department of Physiotherapy, Manipal College of Health Professions, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India.

Current Molecular Medicine
|November 30, 2021
PubMed
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Exercise improves skeletal muscle mitochondria function, counteracting age-related decline. This review covers exercise adaptations, aging effects, and biomarkers for mitochondrial health.

Keywords:
Skeletal muscleagingbiomarkerendurance exercisemitochondrial activitystrength training

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Area of Science:

  • Exercise physiology
  • Mitochondrial biology
  • Skeletal muscle function

Background:

  • Skeletal muscles require efficient energy production and distribution for optimal function.
  • Mitochondria form extensive networks within skeletal muscle cells to meet energy demands.
  • Mitochondrial function is crucial for muscle performance and can be influenced by various factors.

Purpose of the Study:

  • To review exercise-induced adaptations in skeletal muscle mitochondria.
  • To discuss the impact of age-related mitochondrial decline on muscle function.
  • To explore biomarkers for assessing mitochondrial function and exercise interference.

Main Methods:

  • Literature review of studies on exercise, skeletal muscle mitochondria, and aging.
  • Analysis of research on mitochondrial adaptations to physical activity.
  • Examination of biomarkers indicative of mitochondrial health and response to exercise.

Main Results:

  • Exercise promotes beneficial adaptations in skeletal muscle mitochondria, enhancing their capacity.
  • Aging is associated with a decline in mitochondrial function, potentially impairing muscle performance.
  • Specific biomarkers can indicate mitochondrial health and how exercise impacts these functions.

Conclusions:

  • Regular exercise can positively modulate skeletal muscle mitochondrial networks.
  • Understanding mitochondrial adaptations and decline is key to maintaining muscle function throughout life.
  • Biomarkers offer valuable insights into mitochondrial responses to exercise and aging.